Artificial-stone making



H* I. KLINE.

AHTIFlCAL STONE NIKNG= vAPPLlcATloh man MAR 3, 1920` 1,844,087', Patented June 22, 1920.

UNITED surgi PATENT OFFICE.

ROBERT I. xLlNiEl, OF INDIANAPOLIS, INDIANA.

AARTIFICIAL srroivn MAKING.

Application led March 8,

17 '0 all whom i may concern:

Be it known that l, Ronnn'r l. KLINE, a citizen vof the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented ay new and useful Artificial-Stone Making; of which the following is a specification.

It is the object of my invention to improve and simplify the making of artificial stone blocks having veneered faces; and

l particularly to make the removal of the stone .from the mold easier and to prevent the likelihood of breaking oil' the corners of the: stone in such removal and in the scrubbing and polishing to which the veneered face of the stone is subjected in order to remove. the cement film and expose the fragments of natural stone which form the basis i but after the ofthe veneering and polish the veneered face.

The accompanying drawing illustrates my invention; Figure l is a transverse vertical section through a mold embodying my invention, with the concrete of the veneering and ot' the body of the stone in place; and` Fig. 2 is a.perspectivegview of such mold inverted, with part of the mold broken away and with'the facing sheet partly relnoved. i

On the face plate 10 having a flat upper face is placed a facing sheet l1, of somewhat greater dimensions than the face of the block is to be. This facing sheet 1l may be of parallined paper or of some smooth sheet metal, such as thin sheet brass. The mold l2 is placed on the facing sheet 11. which because of its size projects outward beneath the lower edges of the mold. The mold is of suitable sine and shape to produce the dcsired block. which may be a building block or any other artificial stone block. The lower edges 13 of the mold 12 are beveled` with an acute angle between such beveled edges and the inner face of the mold, so that the edges of the mold engage the facing sheet 1l only at and near the inner faces of the mold. lVith this beveled-edge construction, a tigl'lt joint is produced between the mold and the facing'sheet--which is not` the case if the edges 13 are not beveled.

Nhen the mold is in place onthe facing sheet. the material for the veneering is put specification of Leiters Patent. Patented J une 22, 1920.

1920.` Serial No. 364,238.

mold on top of the veneering 1.4. The body l5 of. the stone is usuallyof comparatively dry concrete, for conveniencevin manufacturcj'liut in order to get a dense and hard veneer-ing it is made of a comparatively wet mixture of cement and an aggregate of the desired broken stone which the fare of the block is to show, such. as marble or granite. This wet mixture, it is found, will be retained in the mold, because of the character of the joint between the facing sheet l1 and the beveled edges 13. After'the material of the stone has sufficiently hardened, the mold with such material in it is inverted from the position shown in Fig. `l to the position shown in l? ig. 2 to place the veneered face upward. During such inversion the facing veneered face is uppermost the facing sheet ll is peeled oil", as indicated in Fig. 2. This is done while thc stone is 'still in the 'mold l2. so that the sides of the Amold protect the corners of the stone at the face and prevent such corners from being broken ofi' by the'removal of the facing sheet. This protection of the corners is very important in order to get a perfect stone. After the facing sheet has been removed, and while the stone is still in the mold 12, the veneer-ed face is scrubbed with rather a stiff scrubbing brush in order to remove. from rsuch veneered face the thin-film of cement which formed between the fragments of stone of thc vencering and the facing sheet, or is otherwise polished. During this scrubbing and polishing operation, as during the removal of the facing sheet, the mold l2 which surrounds the Stone effectively prevents the corners from being broken ofi', as would otherwise occur on account of the scrubbing brush or other polishing device striking suchcorners. After the film has been removed by this scrubbing operation, to expose the fragments of marble, granite, or other stone forming the face of the veneering and the stone has become sufficient-ly hard, and the face is further polished if desired, the mold l2 is removed, and the stone is complete.

I claim as my invention:

1. In a molding device for making artificial stone, the combination of a face plate, amold coperating with said face plate and having beveled edges with the acute angles toward the inner faces of the mold, and flexible facing sheet of paraflined paper of iiexble faci greater length'nnd breadth than the mold and arranged to be located between the mold and the face plate with the beveled edges of the mold resting upon it, so that when the stone has been molded in the mold the facing sheet may bc peeled off while the lstone is still in the moldA In a molding device for making artiicial stone. the cmnbination of a. face plate) a mold coperating with said face plate and having beveled edges with the acrte angles toward the inner faces of the mold, and a 1g sheet of greater le igth and breadth tlia1.the mold and arranged to be located between the moldand the face plate with the beveled edges of the mold resting when the stone has'been molded in the mold the facing sheet may be peeled off while the stone is still in the mold.

3. The process of making artificial stone, which comprises placing a mold having new eled edges upon a flexible facing sheet rest- BEST minieme COPY ing upon a fece plate with the fbeveled edges of the mold in engagement with such facing sheet, filling the mold with the desired c0n. 25 crete, removing the face plate, and peeling off the flexible facing sheet from the stone while the latter is still in place in the mold,

4C. The process of making artificial Stone,

which comprises placing'a mold having bev 30 flexible acing sheet restling upon a faceplate with e beveled edges of the mold in engagement ith such facing ,sheen filling the mold Withthe desired com*` crete, removing the face plate, peeling o f 35 the flexible facing sheet from the stone while? t, the latter is still in piece' in the molcl, and;l while the stone is still in the mold Workin t on the face exposed by the peeling off o siich facing sheet in order to remove the film 40 of cement and expose and polish the aggregate.

eled edges upon a RoBERT I. marin. 

